From 1df510f4a2dbe0fcb8c9f8a34695abf8d33f9ddc Mon Sep 17 00:00:00 2001
From: Loek Le Blansch <loek@pipeframe.xyz>
Date: Wed, 13 Nov 2024 14:35:27 +0100
Subject: update logging to use C++20 format and classes

---
 src/crepe/CMakeLists.txt | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/crepe/CMakeLists.txt')

diff --git a/src/crepe/CMakeLists.txt b/src/crepe/CMakeLists.txt
index fc95bd3..52a781e 100644
--- a/src/crepe/CMakeLists.txt
+++ b/src/crepe/CMakeLists.txt
@@ -16,6 +16,7 @@ target_sources(crepe PUBLIC FILE_SET HEADERS FILES
 	ValueBroker.h
 	ValueBroker.hpp
 	Exception.h
+	Exception.hpp
 )
 
 add_subdirectory(api)
-- 
cgit v1.2.3


From 5bee4515c1089ce3499bc3b74780db94f0c02306 Mon Sep 17 00:00:00 2001
From: Loek Le Blansch <loek@pipeframe.xyz>
Date: Fri, 15 Nov 2024 20:26:26 +0100
Subject: process feedback on #26

---
 src/crepe/CMakeLists.txt        |  3 ---
 src/crepe/Component.h           |  2 ++
 src/crepe/ComponentManager.cpp  | 11 +++++------
 src/crepe/ComponentManager.h    |  3 ++-
 src/crepe/ComponentManager.hpp  |  1 -
 src/crepe/Exception.cpp         |  8 --------
 src/crepe/Exception.h           | 31 -------------------------------
 src/crepe/Exception.hpp         | 12 ------------
 src/crepe/api/Animator.cpp      |  2 --
 src/crepe/api/Animator.h        |  2 --
 src/crepe/api/BehaviorScript.h  |  3 +--
 src/crepe/api/CMakeLists.txt    |  1 -
 src/crepe/api/Camera.h          |  2 --
 src/crepe/api/Config.h          | 17 +++++++++++------
 src/crepe/api/LoopManager.hpp   |  4 ++--
 src/crepe/api/LoopTimer.h       |  1 -
 src/crepe/api/Rigidbody.h       |  2 --
 src/crepe/api/SceneManager.h    |  3 ---
 src/crepe/api/Script.cpp        |  3 ---
 src/crepe/api/Script.hpp        |  8 +++-----
 src/crepe/api/Sprite.h          |  1 -
 src/crepe/api/Transform.h       |  8 +++++---
 src/crepe/facade/DB.cpp         | 24 +++++++++++++++---------
 src/crepe/facade/DB.h           |  7 ++++---
 src/crepe/facade/SDLContext.cpp |  5 ++---
 src/crepe/util/Log.cpp          |  9 ++++-----
 src/crepe/util/Log.h            |  2 ++
 src/crepe/util/LogColor.cpp     |  1 +
 src/crepe/util/LogColor.h       | 24 +++++++++++++++++++++++-
 src/example/particles.cpp       |  3 ++-
 30 files changed, 84 insertions(+), 119 deletions(-)
 delete mode 100644 src/crepe/Exception.cpp
 delete mode 100644 src/crepe/Exception.h
 delete mode 100644 src/crepe/Exception.hpp
 delete mode 100644 src/crepe/api/Script.cpp

(limited to 'src/crepe/CMakeLists.txt')

diff --git a/src/crepe/CMakeLists.txt b/src/crepe/CMakeLists.txt
index 52a781e..3b05742 100644
--- a/src/crepe/CMakeLists.txt
+++ b/src/crepe/CMakeLists.txt
@@ -4,7 +4,6 @@ target_sources(crepe PUBLIC
 	ComponentManager.cpp
 	Component.cpp
 	Collider.cpp
-	Exception.cpp
 )
 
 target_sources(crepe PUBLIC FILE_SET HEADERS FILES
@@ -15,8 +14,6 @@ target_sources(crepe PUBLIC FILE_SET HEADERS FILES
 	Collider.h
 	ValueBroker.h
 	ValueBroker.hpp
-	Exception.h
-	Exception.hpp
 )
 
 add_subdirectory(api)
diff --git a/src/crepe/Component.h b/src/crepe/Component.h
index 12c10cb..670446f 100644
--- a/src/crepe/Component.h
+++ b/src/crepe/Component.h
@@ -26,6 +26,8 @@ protected:
 	Component(game_object_id_t id);
 	//! Only the ComponentManager can create components
 	friend class ComponentManager;
+public:
+	virtual ~Component() = default;
 
 public:
 	/**
diff --git a/src/crepe/ComponentManager.cpp b/src/crepe/ComponentManager.cpp
index 7af0380..67c6fc7 100644
--- a/src/crepe/ComponentManager.cpp
+++ b/src/crepe/ComponentManager.cpp
@@ -6,6 +6,9 @@
 using namespace crepe;
 using namespace std;
 
+ComponentManager::ComponentManager() { dbg_trace(); }
+ComponentManager::~ComponentManager() { dbg_trace(); }
+
 void ComponentManager::delete_all_components_of_id(game_object_id_t id) {
 	// Loop through all the types (in the unordered_map<>)
 	for (auto & [type, componentArray] : this->components) {
@@ -18,18 +21,14 @@ void ComponentManager::delete_all_components_of_id(game_object_id_t id) {
 }
 
 void ComponentManager::delete_all_components() {
-	// Clear the whole unordered_map<>
 	this->components.clear();
+	this->next_id = 0;
 }
 
-ComponentManager::ComponentManager() { dbg_trace(); }
-ComponentManager::~ComponentManager() { dbg_trace(); }
-
 GameObject ComponentManager::new_object(const string & name, const string & tag,
 										const Vector2 & position,
 										double rotation, double scale) {
-	GameObject object{*this,	this->next_id, name, tag,
-					  position, rotation,	   scale};
+	GameObject object{*this, this->next_id, name, tag, position, rotation, scale};
 	this->next_id++;
 	return object;
 }
diff --git a/src/crepe/ComponentManager.h b/src/crepe/ComponentManager.h
index 51c84a4..ca2e7c6 100644
--- a/src/crepe/ComponentManager.h
+++ b/src/crepe/ComponentManager.h
@@ -6,9 +6,10 @@
 #include <unordered_map>
 #include <vector>
 
-#include "Component.h"
 #include "api/Vector2.h"
 
+#include "Component.h"
+
 namespace crepe {
 
 class GameObject;
diff --git a/src/crepe/ComponentManager.hpp b/src/crepe/ComponentManager.hpp
index 98efb49..0a84468 100644
--- a/src/crepe/ComponentManager.hpp
+++ b/src/crepe/ComponentManager.hpp
@@ -40,7 +40,6 @@ T & ComponentManager::add_component(game_object_id_t id, Args &&... args) {
 	// Check if the vector size is not greater than get_instances_max
 	int max_instances = instance->get_instances_max();
 	if (max_instances != -1 && components[type][id].size() >= max_instances) {
-		// TODO: Exception
 		throw std::runtime_error(
 			"Exceeded maximum number of instances for this component type");
 	}
diff --git a/src/crepe/Exception.cpp b/src/crepe/Exception.cpp
deleted file mode 100644
index 5a24e7e..0000000
--- a/src/crepe/Exception.cpp
+++ /dev/null
@@ -1,8 +0,0 @@
-#include "Exception.h"
-
-using namespace crepe;
-using namespace std;
-
-const char * Exception::what() const noexcept { return error.c_str(); }
-
-Exception::Exception(const string & msg) { this->error = msg; }
diff --git a/src/crepe/Exception.h b/src/crepe/Exception.h
deleted file mode 100644
index 580fc16..0000000
--- a/src/crepe/Exception.h
+++ /dev/null
@@ -1,31 +0,0 @@
-#pragma once
-
-#include <exception>
-#include <format>
-#include <string>
-
-namespace crepe {
-
-//! Exception class
-class Exception : public std::exception {
-public:
-	//! Exception with plain message
-	Exception(const std::string & msg);
-
-	//! Exception with \c std::format message
-	template <class... Args>
-	Exception(std::format_string<Args...> fmt, Args &&... args);
-
-	//! Get formatted error message
-	const char * what() const noexcept;
-
-protected:
-	Exception() = default;
-
-	//! Formatted error message
-	std::string error;
-};
-
-} // namespace crepe
-
-#include "Exception.hpp"
diff --git a/src/crepe/Exception.hpp b/src/crepe/Exception.hpp
deleted file mode 100644
index 7c462a3..0000000
--- a/src/crepe/Exception.hpp
+++ /dev/null
@@ -1,12 +0,0 @@
-#pragma once
-
-#include "Exception.h"
-
-namespace crepe {
-
-template <class... Args>
-Exception::Exception(std::format_string<Args...> fmt, Args &&... args) {
-	this->error = std::format(fmt, std::forward<Args>(args)...);
-}
-
-} // namespace crepe
diff --git a/src/crepe/api/Animator.cpp b/src/crepe/api/Animator.cpp
index 54b2ec3..cccbc67 100644
--- a/src/crepe/api/Animator.cpp
+++ b/src/crepe/api/Animator.cpp
@@ -1,6 +1,4 @@
 
-#include <cstdint>
-
 #include "util/Log.h"
 
 #include "Animator.h"
diff --git a/src/crepe/api/Animator.h b/src/crepe/api/Animator.h
index 75b8139..3573403 100644
--- a/src/crepe/api/Animator.h
+++ b/src/crepe/api/Animator.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <cstdint>
-
 #include "Component.h"
 #include "Sprite.h"
 
diff --git a/src/crepe/api/BehaviorScript.h b/src/crepe/api/BehaviorScript.h
index 2982358..1a8910d 100644
--- a/src/crepe/api/BehaviorScript.h
+++ b/src/crepe/api/BehaviorScript.h
@@ -3,6 +3,7 @@
 #include <memory>
 
 #include "../Component.h"
+
 #include "GameObject.h"
 
 namespace crepe {
@@ -47,8 +48,6 @@ protected:
 	std::unique_ptr<Script> script = nullptr;
 	//! Reference to component manager
 	ComponentManager & component_manager;
-
-private:
 	//! Script accesses the component manager directly via its parent
 	// (BehaviorScript) reference
 	friend class Script;
diff --git a/src/crepe/api/CMakeLists.txt b/src/crepe/api/CMakeLists.txt
index 85696c4..f9b370f 100644
--- a/src/crepe/api/CMakeLists.txt
+++ b/src/crepe/api/CMakeLists.txt
@@ -1,7 +1,6 @@
 target_sources(crepe PUBLIC
 	# AudioSource.cpp
 	BehaviorScript.cpp
-	Script.cpp
 	GameObject.cpp
 	Rigidbody.cpp
 	ParticleEmitter.cpp
diff --git a/src/crepe/api/Camera.h b/src/crepe/api/Camera.h
index d8c08a6..bf97731 100644
--- a/src/crepe/api/Camera.h
+++ b/src/crepe/api/Camera.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <cstdint>
-
 #include "Color.h"
 #include "Component.h"
 
diff --git a/src/crepe/api/Config.h b/src/crepe/api/Config.h
index e3f86bf..92b20b7 100644
--- a/src/crepe/api/Config.h
+++ b/src/crepe/api/Config.h
@@ -4,16 +4,21 @@
 
 namespace crepe {
 
+/**
+ * \brief Global configuration interface
+ *
+ * This class stores engine default settings. Properties on this class are only
+ * supposed to be modified *before* execution is handed over from the game
+ * programmer to the engine (i.e. the main loop is started).
+ */
 class Config {
-private:
-	Config() = default;
-
-public:
-	~Config() = default;
-
 public:
 	//! Retrieve handle to global Config instance
 	static Config & get_instance();
+
+private:
+	Config() = default;
+
 	// singleton
 	Config(const Config &) = delete;
 	Config(Config &&) = delete;
diff --git a/src/crepe/api/LoopManager.hpp b/src/crepe/api/LoopManager.hpp
index 8fb9aa3..85a329b 100644
--- a/src/crepe/api/LoopManager.hpp
+++ b/src/crepe/api/LoopManager.hpp
@@ -2,8 +2,8 @@
 
 #include <cassert>
 #include <memory>
+#include <format>
 
-#include "../Exception.h"
 #include "../system/System.h"
 
 #include "LoopManager.h"
@@ -18,7 +18,7 @@ T & LoopManager::get_system() {
 
 	const type_info & type = typeid(T);
 	if (!this->systems.contains(type))
-		throw Exception("LoopManager: %s is not initialized", type.name());
+		throw runtime_error(format("LoopManager: {} is not initialized", type.name()));
 
 	System * system = this->systems.at(type).get();
 	T * concrete_system = dynamic_cast<T *>(system);
diff --git a/src/crepe/api/LoopTimer.h b/src/crepe/api/LoopTimer.h
index 85687be..aff4bf7 100644
--- a/src/crepe/api/LoopTimer.h
+++ b/src/crepe/api/LoopTimer.h
@@ -1,7 +1,6 @@
 #pragma once
 
 #include <chrono>
-#include <cstdint>
 
 namespace crepe {
 
diff --git a/src/crepe/api/Rigidbody.h b/src/crepe/api/Rigidbody.h
index 2e20288..11544e5 100644
--- a/src/crepe/api/Rigidbody.h
+++ b/src/crepe/api/Rigidbody.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <cstdint>
-
 #include "../Component.h"
 
 #include "Vector2.h"
diff --git a/src/crepe/api/SceneManager.h b/src/crepe/api/SceneManager.h
index 553194f..e854794 100644
--- a/src/crepe/api/SceneManager.h
+++ b/src/crepe/api/SceneManager.h
@@ -13,7 +13,6 @@ class ComponentManager;
 class SceneManager {
 public:
 	SceneManager(ComponentManager & mgr);
-	virtual ~SceneManager() = default;
 
 public:
 	/**
@@ -38,8 +37,6 @@ public:
 private:
 	std::vector<std::unique_ptr<Scene>> scenes;
 	std::string next_scene;
-
-protected:
 	ComponentManager & component_manager;
 };
 
diff --git a/src/crepe/api/Script.cpp b/src/crepe/api/Script.cpp
deleted file mode 100644
index 390cec7..0000000
--- a/src/crepe/api/Script.cpp
+++ /dev/null
@@ -1,3 +0,0 @@
-#include "Script.h"
-
-using namespace crepe;
diff --git a/src/crepe/api/Script.hpp b/src/crepe/api/Script.hpp
index aceb38b..13b8077 100644
--- a/src/crepe/api/Script.hpp
+++ b/src/crepe/api/Script.hpp
@@ -1,7 +1,6 @@
 #pragma once
 
 #include "../ComponentManager.h"
-#include "../Exception.h"
 
 #include "BehaviorScript.h"
 #include "Script.h"
@@ -10,11 +9,10 @@ namespace crepe {
 
 template <typename T>
 T & Script::get_component() const {
-	std::vector<std::reference_wrapper<T>> all_components
-		= this->get_components<T>();
+	using namespace std;
+	vector<reference_wrapper<T>> all_components = this->get_components<T>();
 	if (all_components.size() < 1)
-		throw Exception("Script: no component found with type = {}",
-						typeid(T).name());
+		throw runtime_error(format("Script: no component found with type = {}", typeid(T).name()));
 
 	return all_components.back().get();
 }
diff --git a/src/crepe/api/Sprite.h b/src/crepe/api/Sprite.h
index deb3f93..754184b 100644
--- a/src/crepe/api/Sprite.h
+++ b/src/crepe/api/Sprite.h
@@ -1,6 +1,5 @@
 #pragma once
 
-#include <cstdint>
 #include <memory>
 
 #include "Color.h"
diff --git a/src/crepe/api/Transform.h b/src/crepe/api/Transform.h
index 902dafa..7d6f785 100644
--- a/src/crepe/api/Transform.h
+++ b/src/crepe/api/Transform.h
@@ -28,9 +28,11 @@ protected:
 	 * \param rotation The rotation of the GameObject
 	 * \param scale The scale of the GameObject
 	 */
-	Transform(game_object_id_t id, const Vector2 & point, double rotation = 0,
-			  double scale = 0);
-	//! There is always exactly one transform component per entity
+	Transform(game_object_id_t id, const Vector2 & point, double rotation, double scale);
+	/**
+	 * There is always exactly one transform component per entity
+	 * \return 1
+	 */
 	virtual int get_instances_max() const { return 1; }
 	//! ComponentManager instantiates all components
 	friend class ComponentManager;
diff --git a/src/crepe/facade/DB.cpp b/src/crepe/facade/DB.cpp
index 80047a6..322ecc0 100644
--- a/src/crepe/facade/DB.cpp
+++ b/src/crepe/facade/DB.cpp
@@ -1,6 +1,5 @@
 #include <cstring>
 
-#include "Exception.h"
 #include "util/Log.h"
 
 #include "DB.h"
@@ -15,18 +14,18 @@ DB::DB(const string & path) {
 	// init database struct
 	libdb::DB * db;
 	if ((ret = libdb::db_create(&db, NULL, 0)) != 0)
-		throw Exception("db_create: {}", libdb::db_strerror(ret));
+		throw runtime_error(format("db_create: {}", libdb::db_strerror(ret)));
 	this->db = {db, [](libdb::DB * db) { db->close(db, 0); }};
 
 	// load or create database file
 	ret = this->db->open(this->db.get(), NULL, path.c_str(), NULL,
 						 libdb::DB_BTREE, DB_CREATE, 0);
-	if (ret != 0) throw Exception("db->open: {}", libdb::db_strerror(ret));
+	if (ret != 0) throw runtime_error(format("db->open: {}", libdb::db_strerror(ret)));
 
 	// create cursor
 	libdb::DBC * cursor;
 	ret = this->db->cursor(this->db.get(), NULL, &cursor, 0);
-	if (ret != 0) throw Exception("db->cursor: {}", libdb::db_strerror(ret));
+	if (ret != 0) throw runtime_error(format("db->cursor: {}", libdb::db_strerror(ret)));
 	this->cursor = {cursor, [](libdb::DBC * cursor) { cursor->close(cursor); }};
 }
 
@@ -44,21 +43,28 @@ string DB::get(const string & key) {
 	memset(&db_val, 0, sizeof(libdb::DBT));
 
 	int ret = this->cursor->get(this->cursor.get(), &db_key, &db_val, DB_FIRST);
-	if (ret != 0) throw Exception("cursor->get: {}", libdb::db_strerror(ret));
-	return {static_cast<char *>(db_val.data), db_val.size};
+	if (ret == 0)
+		return {static_cast<char *>(db_val.data), db_val.size};
+
+	string err = format("cursor->get: {}", libdb::db_strerror(ret));
+	if (ret == DB_NOTFOUND)
+		throw out_of_range(err);
+	else
+		throw runtime_error(err);
 }
 
 void DB::set(const string & key, const string & value) {
 	libdb::DBT db_key = this->to_thing(key);
 	libdb::DBT db_val = this->to_thing(value);
 	int ret = this->db->put(this->db.get(), NULL, &db_key, &db_val, 0);
-	if (ret != 0) throw Exception("cursor->get: {}", libdb::db_strerror(ret));
+	if (ret != 0)
+		throw runtime_error(format("cursor->get: {}", libdb::db_strerror(ret)));
 }
 
-bool DB::has(const std::string & key) noexcept {
+bool DB::has(const std::string & key) {
 	try {
 		this->get(key);
-	} catch (...) {
+	} catch (std::out_of_range &) {
 		return false;
 	}
 	return true;
diff --git a/src/crepe/facade/DB.h b/src/crepe/facade/DB.h
index 7c757a2..2112216 100644
--- a/src/crepe/facade/DB.h
+++ b/src/crepe/facade/DB.h
@@ -34,7 +34,8 @@ public:
 	 *
 	 * \return The value
 	 *
-	 * \throws Exception if value is not found in DB or other error occurs
+	 * \throws std::out_of_range if value is not found in DB
+	 * \throws std::runtime_error if other error occurs
 	 */
 	std::string get(const std::string & key);
 	/**
@@ -43,7 +44,7 @@ public:
 	 * \param key  The value key
 	 * \param value  The value to store
 	 *
-	 * \throws Exception if an error occurs
+	 * \throws std::runtime_error if an error occurs
 	 */
 	void set(const std::string & key, const std::string & value);
 	/**
@@ -53,7 +54,7 @@ public:
 	 *
 	 * \returns True if the key exists, or false if it does not
 	 */
-	bool has(const std::string & key) noexcept;
+	bool has(const std::string & key);
 
 private:
 	//! RAII wrapper around \c DB struct
diff --git a/src/crepe/facade/SDLContext.cpp b/src/crepe/facade/SDLContext.cpp
index a68d940..65ea962 100644
--- a/src/crepe/facade/SDLContext.cpp
+++ b/src/crepe/facade/SDLContext.cpp
@@ -10,17 +10,16 @@
 #include <iostream>
 #include <memory>
 #include <string>
-#include <utility>
 
 #include "../api/Sprite.h"
 #include "../api/Texture.h"
 #include "../api/Transform.h"
 #include "../util/Log.h"
-#include "Exception.h"
 
 #include "SDLContext.h"
 
 using namespace crepe;
+using namespace std;
 
 SDLContext & SDLContext::get_instance() {
 	static SDLContext instance;
@@ -171,7 +170,7 @@ SDLContext::texture_from_path(const std::string & path) {
 		this->game_renderer.get(), img_surface.get());
 
 	if (tmp_texture == nullptr) {
-		throw Exception("Texture cannot be load from {}", path);
+		throw runtime_error(format("Texture cannot be load from {}", path));
 	}
 
 	std::unique_ptr<SDL_Texture, std::function<void(SDL_Texture *)>>
diff --git a/src/crepe/util/Log.cpp b/src/crepe/util/Log.cpp
index e583734..84d80a8 100644
--- a/src/crepe/util/Log.cpp
+++ b/src/crepe/util/Log.cpp
@@ -1,9 +1,8 @@
-#include <cstdarg>
-#include <cstdio>
-#include <cstdlib>
+#include <iostream>
 #include <string>
 
 #include "../api/Config.h"
+
 #include "Log.h"
 
 using namespace crepe;
@@ -33,6 +32,6 @@ void Log::log(const Level & level, const string & msg) {
 	if (!out.ends_with("\n")) out += "\n";
 
 	// TODO: also log to file or smth
-	fwrite(out.c_str(), 1, out.size(), stdout);
-	fflush(stdout);
+	cout.write(out.data(), out.size());
+	cout.flush();
 }
diff --git a/src/crepe/util/Log.h b/src/crepe/util/Log.h
index 01452b2..e0844ca 100644
--- a/src/crepe/util/Log.h
+++ b/src/crepe/util/Log.h
@@ -76,6 +76,8 @@ private:
 	 * \brief Output a message prefix depending on the log level
 	 *
 	 * \param level Message severity
+	 *
+	 * \return Colored message severity prefix string
 	 */
 	static std::string prefix(const Level & level);
 };
diff --git a/src/crepe/util/LogColor.cpp b/src/crepe/util/LogColor.cpp
index ae44d72..170ddcf 100644
--- a/src/crepe/util/LogColor.cpp
+++ b/src/crepe/util/LogColor.cpp
@@ -1,6 +1,7 @@
 #include <cstdarg>
 
 #include "../api/Config.h"
+
 #include "LogColor.h"
 
 using namespace crepe;
diff --git a/src/crepe/util/LogColor.h b/src/crepe/util/LogColor.h
index 4b65127..132fb94 100644
--- a/src/crepe/util/LogColor.h
+++ b/src/crepe/util/LogColor.h
@@ -12,7 +12,13 @@ namespace crepe {
  */
 class LogColor {
 public:
-	//! Get color code as stl string (or color content string)
+	/**
+	 * \brief Get color code as STL string
+	 *
+	 * \param content If given, color this string and append a color reset escape sequence.
+	 *
+	 * \returns Color escape sequence
+	 */
 	const std::string str(const std::string & content = "") const;
 
 public:
@@ -20,6 +26,13 @@ public:
 	LogColor & reset();
 
 public:
+	/**
+	 * \name Foreground colors
+	 *
+	 * These functions set the foreground (text) color. The \c bright parameter
+	 * makes the color brighter, or bold on some terminals.
+	 * \{
+	 */
 	LogColor & fg_black(bool bright = false);
 	LogColor & fg_red(bool bright = false);
 	LogColor & fg_green(bool bright = false);
@@ -28,8 +41,16 @@ public:
 	LogColor & fg_magenta(bool bright = false);
 	LogColor & fg_cyan(bool bright = false);
 	LogColor & fg_white(bool bright = false);
+	/// \}
 
 public:
+	/**
+	 * \name Background colors
+	 *
+	 * These functions set the background color. The \c bright parameter makes
+	 * the color brighter.
+	 * \{
+	 */
 	LogColor & bg_black(bool bright = false);
 	LogColor & bg_red(bool bright = false);
 	LogColor & bg_green(bool bright = false);
@@ -38,6 +59,7 @@ public:
 	LogColor & bg_magenta(bool bright = false);
 	LogColor & bg_cyan(bool bright = false);
 	LogColor & bg_white(bool bright = false);
+	/// \}
 
 private:
 	/**
diff --git a/src/example/particles.cpp b/src/example/particles.cpp
index 6eab046..35faab0 100644
--- a/src/example/particles.cpp
+++ b/src/example/particles.cpp
@@ -14,7 +14,8 @@ using namespace crepe;
 using namespace std;
 
 int main(int argc, char * argv[]) {
-	GameObject game_object(0, "", "", Vector2{0, 0}, 0, 0);
+	ComponentManager mgr{};
+	GameObject game_object = mgr.new_object("", "", Vector2{0, 0}, 0, 0);
 	Color color(0, 0, 0, 0);
 	Sprite test_sprite = game_object.add_component<Sprite>(
 		make_shared<Texture>("../asset/texture/img.png"), color,
-- 
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